Percy Jackson #percyjackson #merman #percy #rickriordan #seaweedbrain Percy is good-natured, friendly, brave, and willing to risk his life to save his friends, strangers, and even his enemies. Percy has a sarcastic sense of humor and is funny in his writing. Percy dislikes nicknames or titles being given to him, with the exception of those given by Annabeth Chase. His fatal flaw is loyalty. He will do anything to save his friends and loved ones.